Author Archives: Ivan Krizsan

About Ivan Krizsan

I am a software developer since the age of 15. During the last few years I have also become an author, since I very much enjoy writing as a way of learning. Currently I work mainly with integration in the Java eco-system. Google

Creating Multipass Virtual Machines with Ansible

By | October 10, 2021

In this article I will automate creation of Multipass virtual machines using Ansible. The manual process is described in an earlier article. As in the previous article, the virtual machines created will be configured as to allow for password-less login using a private key. Prerequisites In order to be able to create Multipass virtual machines,… Read More »

Ansible and Multipass Virtual Machines

By | May 16, 2021

In this article I will show how to set up an Ansible inventory that makes it possible for Ansible to interact with a Multipass virtual machine. Prerequisites A Multipass virtual machine should be created according to instructions in the article Multipass Key-Based Authentication. Note where the file containing the private key is stored.The second prerequisite… Read More »

Metrics Alarms with Prometheus and Alertmanager

By | April 20, 2021

In this article I will use Prometheus and Alertmanager to send alarms when disk-space is low for a Spring Boot application. Actually, any service or application which have metrics that can be scraped by Prometheus can have alarms so the technique described in this article is not only applicable to Spring Boot services and applications.… Read More »

Multipass Key-Based Authentication

By | December 23, 2020

In this article I will show how to create a Multipass virtual machine that has an additional user which can connect to the virtual machine authenticating using a private key. To accomplish this I will use cloud-init when creating the virtual machine. The cause for this is to allow creation and provisioning of Multipass virtual… Read More »

Quest For the Spring Data DynamoDB Grail

By | December 11, 2020

The following are a few words and some simple examples showing how to use Spring Data DynamoDB to store and retrieve data in a DynamoDB database. In the example, which consists of a few tests, I will use a local instance of DynamoDB running in a container. No prior knowledge of DynamoDB is assumed, though… Read More »